I separately ran into this issue (also while trying to do something for cybersyn and was pointed to this post)
I replicated the issue with entirely vanilla features by adding a temp stop using the train gui. And from what I've seen it seems that interrupts can simply not trigger under any ...

Rseding91 wrote: Fri Dec 20, 2024 4:58 pm Thanks for the report however this is not a bug. Assembling machines also do not care about what the value of a signal is.

Then maybe more than just pumps need fixing in that regard.

When you set filters for pumps using circuits they use any nonzero fluid signals, which while not a big deal in itself, tough slightly annoying to deal with, also is just plain inconsistent behavior considering that inserters only set their filter using positive signals, which is an actually useful ...

Basically be able to in an interrupt to just generically say that the station the train should go to should be the one it's currently at.
That way if you have one interrupt you want to be able to trigger at multiple different stations with different names that makes the train do something and then ...